Stop-motion



4 Sheets-Sheet 1. E. WILDER. STOP MOTION.

(No Model.)

Patented Jan. 14, 1890-.

N. PETERS, PhalwLilhogfixphcr. Washinglum D. Cy

(No Model.) 4 SheetsSheet 2. E. WILDER.

STOP MOTION.

No. 419,390. Patented Jan. 14, 1890.

WITN ESS.

NVE N TBFK 4 sheets sheet 4. E. WILDER.

STOP MOTION.

(No Model.)

B I- flu /ITNELSSESII fl k 6251a N. PETERS. Plmlo-Lithogmphur, Washlllglnrp n. cy

UNITED STATES PATENT OFFICE. 3

ELIHU WVILDER, OF NEXVTON, MASSACHUSETTS, ASSIGNOR TO THE PLUME & ATWVOOD MANUFACTURING COMPANY, OF VVATERBURY, CONNECTICUT.

STOP-MOTION.

SPECIFICATION forming part of Letters Patent N 0. 419,390, dated January 14, 1890.

' Application filed August 1, 1887. Serial No. 245,803. (No model.)

To all whom it may concern.-

Be it known that I, ELIHU WILDER, of Newton, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Stop-\Iotionspfwhich the following is a specification.

This invention has for its object to provide means for starting the power-driven shaft of a nail-driving or other machine by the de- IO pression of a treadle controlled by the operator and for automatically stopping the rotation of said shaft after a predetermined period of rotation-that is, after a single operation of the machine (as the driving of one I 5 nail, if it be agnailing 0r tacking machine)- so that in case the operator does not remove his foot from the treadle, but holds the latter depressed, only the predetermined operation of the machine will take place, thus guardmg against damage to the machine or to the operator by a repetition of the operation in consequence of the careless holding down of the treadle by the operator.

The invention consists in the improvements which I will now proceed to describe and claim. Of the accompanying drawings, forming a part of this specification, Figure 1 represents a front elevation of the clutch. Fig. 2 represents a side elevation of the same. Fig. 3 represents a detail view of the catch. Fig. 4 is a front elevation of -a modified form of clutch. Fig. 5 is a side elevation of the same.

Fig. 6 is a perspective view of the latch. 3 5 Figs; 1 and 2 illustrate my clutch attached to the frame of a machine. The treadle A of the machine is connected with a lever a by the rod 6, said lever a being pivoted to the frame at 'c. The lever a is connected to a lever 6 by the link (1. Said lever e is pivoted on a stud 2', secured to the frame of the machine. When the treadle A is lowered, pulling down the levers Ct and e, the pawl f engages one of the teeth in the ratchet j and pushes said ratchet around through the space of a tooth. In the face of the ratchet j is a cam it, which engages a friction-roll Z, said roll being pivoted on a stud on the slide m. The slide m is guided by the stud 2', and is connected at its upper end to a lever 11, pivoted at o the frame of the machine. The lever n is provided with a spring-catch o, as seen in detail in Fig. 3. An arm 19, Fig. 3, is fastened to the lever 12, on whicha spring-pawl r is pivoted. On the shaft q of the machine, to which the clutch is applied, is a pulley 7', which is connected by a sleeve u to a balance-wheel 8, both running loose on the shaft q. A loose pulley 15 runs on the sleeve to.

10 represents a slide, which is raised and lowered by means of the cam-roll a in a camgroove I). Said slide-piece is provided with 'a slotc, through which the shaft q passes,

forming a guide for the slide-piece w. The loose end of the slide-piece w is connected to 05 a lever 61, pivoted on stud t' and carrying on its outer end a pawl e, which engages with the ratchet j, being kept in contact with said ratchet by a spring f. On the face of the disk 12 is a dog g, pivoted at h to ears on said disk. Said dog is thrown out from the surface of the disk 0 by thespring i. When the ratchet j has been pushed from the position shown in Fig. 1 through the space of one tooth by lowering the treadle, as described, the cam-roll Zwill be depressed by a projection j on the cam 70, said roll carrying with it the slide m and lever n and releasing the dog g from the spring-catches 0 and 0*. it is thrown out by the spring 1" toward the rotating pulley r and engages with one of the series of lugs Z Z, Fig. 2, on said pulley r, so that the disk 1) is locked to the pulley 1' until it has made one rotation, when it is disconnected from the pulley r by the contact of the dog g with the cam-shaped end m, Fig. 3, of the lever n, which throws the dog toward the disk 1; and out of connection with the lugs Z by which it was engaged. The dog g passes between the spring-catches 0 and r and stops against the projection n on lever 91, being held against the same by the spring-catches 0 and 0*, which are constructed to permit the dog to pass between them in 5 one direction and to prevent it from passing in the opposite direction. Itwill be seen that when the disk c makes a rotation the slide to will be moved up and down by the cam-roll a and cam-path I), thus raising and As soon as the dog g is released 80 lowering the lever cl and pawl e, pushing the ratchet j through the space of one tooth and returning for a new feed. \Vhen the ratchetj is pushed through the space of a' tooth, as described, it will be seen that the It will be seen that if the operator keeps. his foot on the treadle the machine will only \Vhen he removes his foot, the spring A on the treadle will throw make one revolution.

the lever 8 back through its connections and take a new tooth on the ratchet j, so that when the treadle is again lowered the ma- Then I the pawls e and f are thrown forward chine will make another revolution.

through the space of a tooth 011 the ratchet jbeyond the position shown in Fig. 1, the

arms-0' and h wedge the said pawls against the ratchet 9, forming a friction to overcome the inertia of said ratchet, the arms 0 and It being fixed. to the frame of the machine.

The pawl pis pivoted to the frame of the machine and acts as a stop to prevent thev ratchet j from rotating in more than one direction. H

. In the modified form of clutch shown in; Figs. at and 5 the rod 1) connects to a slide a having hearings in the frame 12 of the ma-,

chine. Said slide is slotted. at c to clear the stud 21;. A lever c is pivoted on the stud i. The spring-catch 0' is pivot-ed on one arm of said lever,tl 1e other arm being provided with a friction-roll d i The dog g is thrown out by the springz", and

the lugs Z on the pulley r engage with said As the cam 'U revolves in the:

dog, as before. .direction shown by the arrow in Fig. 4 it strikes the roll (1 and returns the lever 6 to its original position. When the cam 0 has made one revolution,it is thrown back by the incline m on lever and out of connection with the lugs Z4 on the pulley r. The dog g stops against the shoulder g on the lever c and is held from rebounding by the springcatch 7*. When the operator releases the treadle, the slide-piece a is carried up by the spring h The stud f passing up on the left of the spring-latch 6 Fig. 4, overcomes the spring 2' and returns to its original position,

shown as soon as the stud f clears it. The

cam 7) holds down the stud f by means of the In the lower. end of the lever c is pivoted a spring-latch 6 When. the slide a is lowered by the rod 1), the lever c is pushed in the direction indicated by dotted lines in Fig. 4 by the stud f which is fastened to the slide-piece a and projects into the lever 0 bearing against the latch 6 said latch I standing on an angle, as seen in Fig. 4, and

roll a in slide-piece a until the cam q) strikes the roll (1 as described. This improved mechanism is intended particularly for use with the tacking-machine shown in Figs. 20 and 21 of my application for Letters Patent for improvements in nailing-machines filed August 1, 1887, Serial No. 245,803, the shaft (1 herein shown being the driving-shaft of said machine.

The machine will be timed so that at each rotation of the driving-shaft the driver will be raised, a nail will be formed, and the driver released and caused by its spring to drive the nail, after which the operation of the machine will cease until the treadle is released by the operator and again depressed, so that even if theoperator keeps the. treadle depressed through inadvertence the machine will not continue to operate, because, as already explained, devices are put in operation by the rotation of the shaft whichdisconnect the shaft from the driving-pulley after the predetermined rotation of the shaft has been completed. It will be observed that the drivin g-pulley and the balance-wheel s are rigidly connected by the sleeve u, and that a loose pulley t is, provided between the driving-pulley and the balance-wheel. This arrangement enables themachine to be operated by. the rotation of the balance-wheel and driving-pulley by hand, the balance-wheel being used as i a hand-wheel. .When this is done, the drivin g-belt will beshifted to theloose pulley and the driving-shaft and driving-pulley willbe connected by the devices described,.so,that the rotation of the balance-wheel by hand will operate the machine. This hand operation will be resorted to only for the purpose of timing the machine or slightly moving its operative parts should occasion require.

I claim V 1. The combination of a rotary shaft, a driv ing-pulley normally loose thereon, a movable connection for detachably connecting the shaft and pulley, the operating-treadle, and the lever operated by said treadle and having a catch at one end with which said 1nov able connection is designed to engage, sub stantially as set forth, whereby when said treadle isdepressed the shaft and pulley are temporarily engaged durin g a predetermined rotation of the latter, and saidfmovable connection is arrested and disengaged at the completion of said rotation, as stated.

2. The combination of a rotary shaft, a power-rotated driving-pulley normally loose thereon, a disk rigidly attached to said shaft, the movable connection between said disk and driving-pulley, the operating-treadle, and the lever operated by said treadle and having a catch at one end with which said movableconnection is designed to engage, substantially as set forth, wherebywhen said treadle is depressed the rotary shaft and pulley are engaged during a predetermined rotationof the" latter and arrested and disengaged at the completion of said rotation, as stated.

3. The combination of a rotary shaft, a power-rotated driving-pulley normally loose thereon, a disk rigidly attached to said sh aft, the spring-pressed dog connected to said disk and designed to engage said pulley, the operating-treadle, and the lever having springcatohes at one end and operated by said treadle, substantially as set forth, whereby when said treadle is depressed the rotary shaft and pulley are engaged during a predetermined rotation of the latter and said dog is arrested by contact with said catches of the lever, as stated.

4. The combination of a rotary shaft, a power-rotated driving-pulley normally loose thereon, a disk rigidly attached to said shaft, the spring-pressed dog connected to said disk and designed to engage said pulley, the operating -treadle, the lever having springcatches, the ratchet-wheel j, and the connections between said treadle and ratchet-wheel and between the latter and said lever, substantially as set forth.

5. The combination of a rotary shaft, a power-rotated driving-pulley normally loose thereon, a disk rigidly attached to said shaft, the spring-pressed dog connected to said disk and designed to engage said pulley, the operating-treadle, the lever having spring-catches, the ratchet-wheel j, having a cam is on its .face, the slide having a roller engaging said cam and connected at one end to said lever, and the connection between said treadle and ratchet-wheel for operating the latter and lowering said slide and lever, substantially as and for the purpose set forth.

6. The combination of a rotary shaft, a power-rotated driving-pulley normally loose thereon, a disk rigidly attached to said shaft and having a cam-groove b, the spring-pressed dog connected to said disk and designed to engage said pulley, the operating-treadle, the lever having spring-catches, the ratchet-wheel j, having a cam is on its face, the slide having a roller engaging said cam and connected at one end to said lever, the pawl-and-link connection between said treadle and ratchet-. Wheel, the slide w, having a cam-roll in said cam-groove b, and the lever-and-pawl connection between said latter slide and said ratchetwheel, substantially as set forth.

7. The combination of the rotary shaft, the driving-pulley normally loose thereon and having a sleeve to, the loose pulley on said sleeve, the movable connection between said shaft and driving-pulley, and the balancewheel affixed to the sleeve 10, whereby when the driving-belt is shifted to the loose pulley and the driving-pulley and shaft are connected the shaft can be rotated by the balance-wheel used as a hand-wheel, as set forth.

In testimony whereof I have signed my name to this specification, in the presence of .two subscribing witnesses, this 28th day of July, 1887.

ELIHU WILDER.

Witnesses:

, C. F. BROWN, ARTHUR W. ORossLEY. 

